Centrifugal propeller



H. HERNU.'

CENTRIFUGAL PROPELLER.

VAPPLICATION FILED JULY-2,1920.

1,408,737. Patented Mar. 7, 1922.

Fug. l. :FLg 21 WiTI IZSSQS kw terior by one or UNITED STATES HENRI HERNU, 0F MEUDON, FRANCE.

GENTRIFUGAL PROPELLER.

Application filed July 2,

To all 107i 0m it may concern:

Be it known that I, HENRI Hnnnu, a citizen of the French Republic, residing at Meudon, Seine-et-Oise, in the French P.epublic, have invented new and useful Improvements in Centrifugal Propellers, of which the following is a specification. This invention relates to centrifugal propellers of that class in which a propeller wheel can be laterally displaced so as to become operative in either one or other chamber of .a divided casing and thereby discharge a current of water in the one or other direction as may be necessary for the direction of a boat. It is the object of this invention to provide a closed turbine casing having outer tubular peripheral chambers extending from a restricted annular portion intermediate said chambers and a laterally displaceable turbine wheel with tapering blades shaped to fit said annular portion, a central inlet leading to both'sides of the wheel and lateral outlets in opposite directions from the tubular chambers.

In the drawings, Figure 1 shows the apparatus in vertical section in a plane perpendicular to the axis of the turbine and showing the blades and the inlet and outlet ports; Fig. 2 is a transverse section in a plane at right angles to that in Fig. 1.

As will be seen from Figs. 1 and 2, the apparatus comprises an inlet A which brings the water to either side and to the center of a turbine wheel B which latter is given a high speed and acts, under centrifugal force, on the water and drives it towards the exother of the chambers C or D.

The apparatus permits of reversing or Specification of Letters Patent.

Patented Mar. 7, 1922.

1920. Serial No. 393,676.

suppressing the propulsion without changing the speed or direction apparatus.

F or this pupose the turbine B is dis placeable laterally in a two-chambered casing forming two adjoining chambers C and D whose outlets E and F respectively are directed, one towards the rear and the other towards the front of the vessel. The chambers are separated by a cylindrical portion G of the external diameter of the turbine wheel B and of the same width.

It will be readily understood that by displacing the turbine wheel laterally opposite the chamber C, the forward movement is obtained the discharge taking place towards the rear through the outlet E. In the position shown at Fig. 2 there is no moveof rotation of the ment of the vessel the turbine being blocked by the cylindrical portion. With the wheel in the position within the chamber D, reverse travel is obtained, the discharge taking place through the port F towards the front of the boat.

I claim:

A centrifugal propeller for boats of that class in which a propeller wheel can be displaced laterally so as to become operative in either one or other chamber of a divided casing, which consists in a closed turbine casing having outer tubular periphera chambers extending from a restricted annular portion intermediate said chambers, a laterally displaceable turbine wheel with tapering blades shaped to fit said annular portion, a central inlet leading to both sides of the wheel, and lateral outlets in opposite directions from the tubular chambers.

HENRI HERNU. 

